Would you like the option to Paint the Ceilings? Yea or Nay?

Yes!! I wouldn’t use it all the time, but as you said sometimes it’s better for immersion.

For instance I built a shipping container home with several containers on top of one another, and while the sides and top of said containers look like metal, it’s all white underneath, which is very annoying as you can see it from under.

Another example : Doesn’t Judith Ward’s mansion look odd with plain white ceilings instead of fancy moldings ?

PS : Have you watched Lilsimsie’s video on it ?